EP1283914B1 - Verfahren und einrichtung zum beizen von edelstahlwarmbändern - Google Patents
Verfahren und einrichtung zum beizen von edelstahlwarmbändern Download PDFInfo
- Publication number
- EP1283914B1 EP1283914B1 EP01938180A EP01938180A EP1283914B1 EP 1283914 B1 EP1283914 B1 EP 1283914B1 EP 01938180 A EP01938180 A EP 01938180A EP 01938180 A EP01938180 A EP 01938180A EP 1283914 B1 EP1283914 B1 EP 1283914B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pickling
- washing
- stages
- special steel
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005554 pickling Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 12
- 239000010959 steel Substances 0.000 title claims abstract description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 38
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000008237 rinsing water Substances 0.000 claims abstract description 11
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 17
- 238000000137 annealing Methods 0.000 claims description 9
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 239000001117 sulphuric acid Substances 0.000 claims 2
- 235000011149 sulphuric acid Nutrition 0.000 claims 2
- 239000002253 acid Substances 0.000 abstract description 6
- 150000007513 acids Chemical class 0.000 abstract description 5
- 229910001566 austenite Inorganic materials 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 18
- 239000010935 stainless steel Substances 0.000 description 18
- 230000008569 process Effects 0.000 description 8
- 238000005422 blasting Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
Definitions
- the invention relates to a method and a device for pickling stainless steel hot strips with austenitic, ferritic and / or martensitic Structure that passes through a pickling line without mechanical beam descaling Pickling stages with acids and rinsing stages with rinsing water.
- the invention has for its object when pickling without an additional Blasting processes for descaling and above all the costs for pickling.
- the object is achieved according to the invention in that the stainless steel hot band is pickled in the pre-pickling stages with hydrochloric acid and in the first flushing stages with nitric acid and an equivalent substitute pickling medium which is formed from a mixture of sulfuric or hydrochloric acid with hydrogen peroxide and other additives and in further flushing stages with flushing water is treated.
- the process does not require additional blasting and the costs for the acids are reduced.
- pickling with nitric acid or an equivalent replacement pickling medium any remaining scale residue on the belt can be removed.
- the use of blasting cabins is not necessary. Since the annealing of stainless steel hot strip is not absolutely necessary after further processing, the costly production on an annealing and pickling line can be avoided under certain circumstances.
- the pickling in hydrochloric acid drastically reduces the amount of metal dissolved in the nitric acid. This is associated with a reduction in the known problematic reaction products (NO x gases in the exhaust air and nitrates in the waste water) which are known from production. Even when using an appropriate replacement medium for the nitric acid, the known disadvantages are also eliminated. According to the teaching of the invention, pickled stainless steel warm tapes with an improved surface quality are also achieved. In addition, the operating costs are significantly lower compared to the known methods.
- the stainless steel warm band in at least one Pickling stage is pickled with hydrochloric acid.
- the stainless steel warmer at least one or more Spdi stages with the nitric acid and an equivalent Replacement pickling medium is treated. This can advantageously be a complete descaling can be achieved.
- the stainless steel warmer subsequently is treated with rinsing water in two or more rinsing stages. Thereby the acids used are completely eliminated.
- the device for pickling stainless steel hot-rolled strip with an austenitic, ferritic and / or martensitic structure which can possibly be guided through a pickling line behind a soft annealing furnace, achieves the object according to the invention in that the stainless steel warming strip, when entering a pickling line, consisting of several pickling tanks with hydrochloric acid and several rinse tanks with nitric acid and an equivalent replacement pickling medium, which is formed from a mixture of sulfuric or hydrochloric acid with hydrogen peroxide and other additives, and further rinse tanks can be treated with rinse water.
- the advantages are the improvements compared to the prior art that have already been mentioned for the method steps.
- the number of pickling stages can be varied. A preferable design results from the fact that in the pickling line the first three pickling tanks are included Hydrochloric acid are filled.
- An advantageous embodiment is proposed in that the rinsing stages from at least one washing tank with nitric acid and an equivalent Replacement pickling medium and from at least two rinsing tanks with rinsing water are formed.
- the stainless steel warm strip 1 arrives from strip coils of an input section 2 by a welding device 3 (for a coil change) through a trimming machine 4 into an input loop machine 5 and, if required, through a soft annealing furnace 6 into the pickling line 7.
- the pickling line 7 forms Pickling stages 8 and rinsing stages 9, which are described in more detail below.
- the stainless steel hot band 1 emerges from the last rinsing stage 9 and into one Output loop former 10 and passes through an output scissors at the end of the tape 11. During the continuous run, the stainless steel warm band 1 wound in bundles in the output section 12 again.
- the pickling line 7 is in the normal steel production Pickling stage 8 operated with three pickling tanks and hydrochloric acid, while the rinsing stages all work with rinse water (rinses 1 and 2, rinses 3 to 6).
- the pickling line 7 is constructed as follows: In pickling tanks 16 of the pickling line 7 is in each case in the pickling stages 8 as pickling medium 14a hydrochloric acid 13. Die Rinse stages 9 are formed by rinse tanks 17 in which there is a replacement pickling medium 14b in the sink no. 1 and located in the # 2 sink nitric acid 14. In the following rinse stages 9, rinse water 15 is used.
- the process now proceeds in such a way that the stainless steel hot band 1 in the pickling stages 8 pickled with hydrochloric acid 13 and in the first rinse steps 9 with nitric acid 14 as well as an equivalent pickling medium 14b rinsed and in further rinsing stages 9 is treated with rinse water 15.
- Two or more pickling stages can be used 8 can be used with hydrochloric acid 13.
- the stainless steel warmer can also be used 1 in two or more rinsing stages 9 with the nitric acid 14 and one equivalent pickling medium 14b are treated. Then that will Stainless steel hot band 1 rinsed in two or more rinse levels 9 with rinse water 15.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Forging (AREA)
Description
Die Vorteile sind die bereits zu den Verfahrensschritten erwähnten Verbesserungen gegenüber dem Stand der Technik.
- Fig. 1
- ein Blockdiagramm einer vollständigen Bandanlage zum Beizen,
- Fig. 2
- zum Vergleich die Beizstufen einer Normalstahlproduktion und
- Fig. 3
- die Beizstufen der Beiz- oder Spültanks in der Edeistahiproduktion.
- 1
- Edelstahlwarmband
- 2
- Eingangsabschnitt
- 3
- Schweißvorrichtung
- 4
- Besäummaschine
- 5
- Eingangs-Schlingenbildner
- 6
- Weichglühofen
- 7
- Beizlinie
- 8
- Beizstufen
- 9
- Spülstufen
- 10
- Ausgangs-Schlingenbildner
- 11
- Ausgangsschere
- 12
- Ausgangsabschnitt
- 13
- Salzsäure
- 14
- Salpetersäure
- 14a
- Beizmedium
- 14b
- Ersatzbeizmedium
- 15
- Spülwasser
- 16
- Beiztanks
- 17
- Spültanks
Claims (8)
- Verfahren zum Beizen von Edelstahlwarmband (1) mit austenitischem, ferritischem und / oder martensitischem Gefüge, das durch Beizstufen (8) mit Salzsäure (13) in Spülstufen (9) mit Salpetersäure (14) und mit Spülwasser (15) geführt wird,
dadurch gekennzeichnet, dass das Edelstahlband (1) aus einem Glühofen (6) austretend nach dem Beizen in einer Beizstufe (8), ohne eine mechanische Strahl-Entzunderung, in einer ersten Spülstufe (9) mit einem Ersatzbeizmedium (14b), bestehend aus einem Gemisch von Schwefel- oder Salzsäure (13) mit Wasserstoffperoxid und weiteren Zusätzen, gebeizt und in einer zweiten Spülstufe (9) mit Salpetersäure (14) gespült und in weiteren Spülstufen (9) mit Spülwasser (!5) behandelt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass das Edelstahlwarmband (1) in zwei oder mehr Beizstufen (8) mit Salzsäure (13) gebeizt wird. - Verfahren nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass das Edelstahlwarmband (1) in zumindest einer oder mehreren Spülstufen (9) mit der Salpetersäure (14) oder dem gleichwertigen Gemisch aus Ersatzbeizmedium (14b) behandelt wird. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass das Edelstahlwarmband (1) anschließend in zwei oder mehr Spülstufen (9) mit Spülwasser (15) behandelt wird. - Einrichtung zum Beizen von Edelstahlwarmband (1) mit austenitischen, ferritischem und/oder martensitischem Gefüge, das ohne eine mechanische Strahl-Entzunderung hinter einem Weichglühofen (6) durch eine Beizlinie (7) führbar ist,
dadurch gekennzeichnet, dass das Edelstahlwarmband (1) bei Eintritt in eine Beizlinie (7), bestehend aus mehreren Beiztanks (16) mit Salzsäure (13) und mehreren Spültanks (17) mit Salpetersäure (14) oder einem gleichwertigen Ersatzbeizmedium (14b), das aus einem Gemisch von Schwefel- oder Salzsäure (13) mit Wasserstoffperoxid und weiteren Zusätzen gebildet ist, und weiteren Spültanks (17) mit Spülwasser (15) behandelbar ist, wobei das Ersatzbeizmedium (14b) in einer ersten und die Salpetersäure (14) in einer zweiten Spülstufe zur Anwendung kommen. - Einrichtung nach Anspruch 5,
dadurch gekennzeichnet, dass in der Beizlinie (7) die ersten drei Beiztanks (16) mit Salzsäure (13) gefüllt sind. - Einrichtung nach einem der Ansprüche 5 oder 6,
dadurch gekennzeichnet, dass in der Beizlinie (7) die Spülstufen (9) aus Spültanks (17) mit Salpetersäure (14) oder dem gleichwertigen Ersatzmedium (14b) und anschließen den Spültanks (17) mit Spülwasser (15) bestehen. - Einrichtung nach Anspruch 7,
dadurch gekennzeichnet, dass die Spülstufen (9) aus zumindest je einem Spültank (17) mit Salpetersäure (14) sowie dem gleichwertigen Ersatzbeizmedium (14b) und aus zumindest zwei Spültanks (17) mit Spülwasser (15) gebildet sind.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10022083 | 2000-05-08 | ||
| DE10022083A DE10022083A1 (de) | 2000-05-08 | 2000-05-08 | Verfahren und Einrichtung zum Beizen von Edelstahlwarmbändern |
| PCT/EP2001/005118 WO2001086024A2 (de) | 2000-05-08 | 2001-05-05 | Verfahren und einrichtung zum beizen von edelstahlwarmbändern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1283914A2 EP1283914A2 (de) | 2003-02-19 |
| EP1283914B1 true EP1283914B1 (de) | 2004-06-30 |
Family
ID=7640997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01938180A Expired - Lifetime EP1283914B1 (de) | 2000-05-08 | 2001-05-05 | Verfahren und einrichtung zum beizen von edelstahlwarmbändern |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US6843860B2 (de) |
| EP (1) | EP1283914B1 (de) |
| JP (1) | JP2004511649A (de) |
| KR (1) | KR20020091279A (de) |
| CN (1) | CN1281789C (de) |
| AT (1) | ATE270354T1 (de) |
| CA (1) | CA2406647A1 (de) |
| DE (2) | DE10022083A1 (de) |
| ES (1) | ES2223866T3 (de) |
| MX (1) | MXPA02011004A (de) |
| TR (1) | TR200401642T4 (de) |
| WO (1) | WO2001086024A2 (de) |
| ZA (1) | ZA200209827B (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2695973T3 (es) * | 2010-05-27 | 2019-01-11 | Mj Liquid Solutions Inc | Método de tratamiento de artículo de acero laminado |
| CN102011131B (zh) * | 2010-07-27 | 2012-05-23 | 福建方明环保科技有限公司 | 污水零排放金属带材表面清洗装置及其清洗方法 |
| CN103572037A (zh) * | 2013-10-12 | 2014-02-12 | 酒泉钢铁(集团)有限责任公司 | 一种钢铁热轧卷材板材共线热处理生产线及生产工艺 |
| CN112795934B (zh) * | 2020-12-27 | 2022-07-08 | 山东盛阳金属科技股份有限公司 | 一种300系不锈钢花纹板酸洗系统及其工艺 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL220946A (de) * | 1956-09-25 | |||
| JPS6063390A (ja) * | 1983-09-19 | 1985-04-11 | Kawasaki Steel Corp | フェライト系およびマルテンサイト系ステンレス鋼帯の連続酸洗方法 |
| JP2613317B2 (ja) * | 1990-04-20 | 1997-05-28 | 川崎製鉄株式会社 | ステンレス鋼帯の焼鈍・脱スケール方法 |
| US5821212A (en) | 1997-02-13 | 1998-10-13 | Crown Technology, Inc. | Rinse aid and process for stainless steel |
-
2000
- 2000-05-08 DE DE10022083A patent/DE10022083A1/de not_active Withdrawn
-
2001
- 2001-05-05 AT AT01938180T patent/ATE270354T1/de active
- 2001-05-05 CN CNB018092438A patent/CN1281789C/zh not_active Expired - Fee Related
- 2001-05-05 WO PCT/EP2001/005118 patent/WO2001086024A2/de not_active Ceased
- 2001-05-05 EP EP01938180A patent/EP1283914B1/de not_active Expired - Lifetime
- 2001-05-05 MX MXPA02011004A patent/MXPA02011004A/es active IP Right Grant
- 2001-05-05 ES ES01938180T patent/ES2223866T3/es not_active Expired - Lifetime
- 2001-05-05 DE DE50102747T patent/DE50102747D1/de not_active Expired - Lifetime
- 2001-05-05 CA CA002406647A patent/CA2406647A1/en not_active Abandoned
- 2001-05-05 TR TR2004/01642T patent/TR200401642T4/xx unknown
- 2001-05-05 US US10/258,909 patent/US6843860B2/en not_active Expired - Fee Related
- 2001-05-05 JP JP2001582607A patent/JP2004511649A/ja not_active Withdrawn
- 2001-05-05 KR KR1020027014938A patent/KR20020091279A/ko not_active Abandoned
-
2002
- 2002-12-04 ZA ZA200209827A patent/ZA200209827B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CN1439063A (zh) | 2003-08-27 |
| MXPA02011004A (es) | 2003-04-25 |
| US20030178045A1 (en) | 2003-09-25 |
| EP1283914A2 (de) | 2003-02-19 |
| DE50102747D1 (de) | 2004-08-05 |
| DE10022083A1 (de) | 2001-11-15 |
| KR20020091279A (ko) | 2002-12-05 |
| CA2406647A1 (en) | 2002-10-28 |
| WO2001086024A2 (de) | 2001-11-15 |
| ES2223866T3 (es) | 2005-03-01 |
| ZA200209827B (en) | 2003-10-07 |
| ATE270354T1 (de) | 2004-07-15 |
| CN1281789C (zh) | 2006-10-25 |
| WO2001086024A3 (de) | 2002-11-07 |
| TR200401642T4 (tr) | 2004-08-23 |
| JP2004511649A (ja) | 2004-04-15 |
| US6843860B2 (en) | 2005-01-18 |
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